#include<QApplication>
#include<QHBoxLayout>
#include<QSlider>
#include<QSpinBox>

int main(int argc,char** argv)
{
    QApplication app(argc,argv);

    QWidget *window = new QWidget;
    window->setWindowTitle("Enter Your Age");

    QSpinBox *spinBox = new QSpinBox;
    spinBox->setRange(20,50);

    QSlider *slider = new QSlider(Qt::Horizontal);
    slider->setRange(20,50);

    QObject::connect(spinBox,SIGNAL(valueChanged(int)),slider,SLOT(setValue(int)));

    QObject::connect(slider,SIGNAL(valueChanged(int)),spinBox,SLOT(setValue(int)));

    spinBox->setValue(35);

    QHBoxLayout *layout = new QHBoxLayout;
    layout->addWidget(spinBox);
    layout->addWidget(slider);
    window->setLayout(layout);

    window->resize(400,300);
    window->show();
    return app.exec();

}













